GPA Calculator

What Is a GPA?

GPA stands for Grade Point Average — a single number, usually between 0.0 and 4.0, that summarizes your academic performance across courses. Each letter grade you earn is converted to a grade point (A = 4.0, B = 3.0, C = 2.0, D = 1.0, F = 0), and those points are averaged with heavier courses counting more.

Your GPA follows you through high school, college, and beyond. It matters for college admissions, scholarship eligibility, honors distinctions, graduate school applications, some job applications, and maintaining academic standing. A GPA calculator removes the arithmetic burden: enter your grades and credits, and it produces the credit-weighted average instantly.

The GPA Formula

GPA is not a simple average of your grades — it is a weighted average where each course's weight is its credit hours. First convert each grade to grade points, then multiply by credits to get quality points:

Then sum the quality points across all courses and divide by total credit hours:

The weighting is the key idea: an A in a 4-credit chemistry class contributes 16 quality points, while an A in a 1-credit lab contributes only 4. That is why strong performance in high-credit courses moves your GPA the most.

Letter Grade to Grade Point Table (4.0 Scale)

The standard US 4.0 scale converts letter grades to points. Many schools include plus and minus grades, which is the default scale in the calculator above:

Some schools use a slightly different scale (for example, A+ = 4.3 or no plus/minus at all). If your institution differs, use your school's official values — a generic calculator result is an estimate, not an official transcript figure.

How to Calculate Your GPA: Worked Example

Take a typical semester: an A in a 3-credit class, a B in a 4-credit class, and a C in a 3-credit class.

1. Convert grades to points: A = 4.0, B = 3.0, C = 2.0.
2. Multiply each by its credits: 4.0 × 3 = 12, 3.0 × 4 = 12, 2.0 × 3 = 6.
3. Add the quality points: 12 + 12 + 6 = 30.
4. Add the credits: 3 + 4 + 3 = 10.
5. Divide: 30 ÷ 10 = 3.0.

Notice that a plain average of the grade points (4.0 + 3.0 + 2.0) ÷ 3 = 3.0 gives the same answer here only by coincidence — the correct credit-weighted method is what your school actually uses.

Worked Example With Plus/Minus Grades

Plus and minus grades change the result, so they deserve their own example: A− (3.7) in 3 credits, B+ (3.3) in 4 credits, and B (3.0) in 3 credits.

1. Quality points: 3.7 × 3 = 11.1, 3.3 × 4 = 13.2, 3.0 × 3 = 9.0.
2. Total quality points: 11.1 + 13.2 + 9.0 = 33.3.
3. Total credits: 3 + 4 + 3 = 10.
4. GPA: 33.3 ÷ 10 = 3.33.

If these same letter grades had been recorded without plus/minus (A, B, B), the GPA would have been 3.4. Small differences in scale can shift borderline results, so always match your school's published scale.

Semester GPA vs. Cumulative GPA

Your semester GPA covers one term. Your cumulative GPA covers every graded course you have ever taken — freshman year counts, and it stays in the figure for as long as you are enrolled.

To combine terms, do not average the two GPAs. Instead, add all quality points and all credits across every term, then divide:

Example: 48 quality points over 15 credits plus 43.2 over 12 credits gives (48 + 43.2) ÷ 27 = 3.38. Never average the semester GPAs directly — that ignores the different credit loads each term carries.

Weighted vs. Unweighted GPA

Unweighted GPA caps at 4.0 and treats every class equally: an A is 4.0 whether it is gym or calculus. Weighted GPA adds bonus points for harder courses — commonly +0.5 for honors and +1.0 for AP or IB — so a weighted GPA can exceed 4.0.

Example: an A in 3-credit honors (4.5 points), an A in 3-credit regular (4.0), and a B in 4 credits (3.0). Weighted GPA = (13.5 + 12 + 12) ÷ 10 = 3.75; unweighted, the same grades give 36 ÷ 10 = 3.60. Weight policies are set by your school — always confirm the scale before comparing two GPAs.

How to Raise Your GPA

GPA is a running average, so future grades move it more than past ones do. Practical strategies:

• Target high-credit courses first. A grade improvement in a 4-credit class moves the GPA twice as much as in a 2-credit class.
• Cross grade boundaries. Focus on classes where a small push moves B+ to A− rather than classes already at a comfortable mid-grade.
• Retake failed or low-grade courses. A retaken F replaced by a B removes one of the heaviest drags on the average — check whether your school replaces or averages the attempts.
• Protect the trend. Admissions readers reward upward trajectories; a rising GPA signals improving mastery.

Common GPA Mistakes

• Mistake 1: Averaging grades instead of weighting by credits. A plain average of letter-grade points ignores credit hours and gives the wrong number whenever credits differ.
• Mistake 2: Averaging semester GPAs to get the cumulative GPA. Combine quality points and credits across terms instead, as shown above.
• Mistake 3: Forgetting that F still counts credits. An F contributes 0 quality points but its credits stay in the denominator — one failed 3-credit course can drop a 15-credit semester GPA by 0.8 points.
• Mistake 4: Mixing scales. Comparing a 4.0-scale GPA with a 5.0-scale GPA is meaningless; always note which scale a number is on.
• Mistake 5: Rounding too early. Keep full precision through the calculation and round only the final result to two decimals.

Frequently Asked Questions

Conclusion

Your GPA is a credit-weighted average of your grade points: convert each letter grade to points on the 4.0 scale, multiply by credit hours to get quality points, sum them, and divide by total credits. That single formula handles semester GPAs, cumulative GPAs, and weighted vs. unweighted variations.

Weight by credits, combine quality points across terms, match your school's exact scale, and remember that high-credit courses drive the biggest changes. Use the GPA calculator at the top of this page for an instant, accurate result.